<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
	
	    <div style="text-align: center;">
	        <select name="" id="se1">
	            <option value="">选择大小</option>
	            <option value="大">选大</option>
	            <option value="小">选小</option>
	        </select>
	        <br />
	        <br />
	        <img src="img2/1.jpg" alt="" width="110px" height="110px" id="imgid">
	        <br />
	        <input type="button" value="开始" onclick="cliall()">
	    </div>
	
	</body>
	    <script>
	        var seobj=document.getElementById('se1');
	        function cliall(){
	           // event.target.value='开始循环';
	           var ii=0;
	            if (seobj.value=='') {
	                alert('请下注!!');
	                return false;
	            }
	            var temp=setInterval(function(){
	                var imgobj=document.getElementById('imgid');
	                var k=inter();
	                console.log('输出点数'+k);
	                var str='img2/'+k+'.jpg'
	                imgobj.src=str;
	                ii++;
	                if(ii>20){
	                    clearInterval(temp);
	                    aa(k);
	                }
	            },150);
	        };
	        function inter(){
	            while(true){
	                var i=Math.ceil(Math.random()*6)
	                if (i!==0) {
	                    return i;
	                }
	            }
	        }
	        function aa(k){
	           // var seobj=document.getElementById('se1');
	            if (seobj.value=='大') {
	                if (k>3) {
	                    alert('你赢了！');
	                }else{
	                    alert('完蛋没钱了！');
	                }
	            }else if (seobj.value=='小') {
	                if (k<4) {
	                    alert('你赢了！');
	                }else{
	                    alert('完蛋没钱了！');
	                }
	            }
	        }
	    </script>
</html>
